Problems with fuel and the fuel tankProblemPossible causes/consequences and M SolutionsFuel is leaking from the
vehicle.GRisk of explosion or fire
The fuel line or the fuel tank is defective.
XTurn the SmartKey to position 0(Y page 145) in the ignition lock
immediately and remove it.XDo not restart the engine under any circumstances.XConsult a qualified specialist workshop.The fuel filler flap
cannot be opened.The fuel filler flap is not unlocked.
or
The SmartKey battery is discharged.XUnlock the vehicle using the mechanical key ( Y page 77).XOpen the trunk lid or the tailgate.XManually unlock the fuel filler flap using the emergency release
( Y page 163).164RefuelingDriving and parking
Adding DEFGWARNING
Make sure
R DEF does not come into contact with skin,
eyes, or clothing
R to keep DEF out of the reach of children
If you and/or others have come into contact
with DEF:
R If DEF has gotten into contact with eyes,
flush with plenty of water immediately and
seek medical help.
R Clean affected skin immediately with plenty
of water.
R If DEF was swallowed, rinse mouth
immediately with plenty of water and drink
plenty of water. Consult a physician.
GWARNING
If you open the DEF tank cap at high
temperatures, ammonia vapors can be
released.
Ammonia vapors have a pungent odor and are
particularly irritating to:
R skin
R mucous membranes
R eyes
You may experience a burning sensation in
your eyes, nose and throat, as well as
coughing and watering of the eyes.
Do not inhale any ammonia vapors that may
be released. Only refill the DEF tank in well
ventilated areas.
! Only use DEF that complies with
ISO 22241. Do not add any special
additives to DEF and do not thin DEF with
water. This could destroy the BlueTEC
exhaust gas aftertreatment.
If the outside temperature is lower than
Ò 11 †, damage may occur when topping up.
If DEF is frozen and there is an active warning
indicator, topping up may not be possible.
Park the vehicle in a warmer place, e.g. in a
garage, until DEF has become fluid again.
Filling is then possible again. Alternatively,
have the DEF tank refilled at a qualified
specialist workshop.
! Rinse surfaces that have come into
contact with DEF immediately with water or
remove DEF using a damp cloth and cold
water. If the DEF has already crystallized,
use a sponge and cold water to clean it. DEF
residues crystallize after time and
contaminate the affected surfaces.
! DEF is not a fuel additive and must not be
added to the fuel tank. If DEF is added to
the fuel tank, this can lead to engine
damage.
i If you are adding between maintenance
intervals, add approximately 1 gallon (3.8 l)
of DEF to the DEF tank. One gallon (3.8 l)
of DEF is approximately 2 DEF refill bottles.
Then, have the DEF supply checked and
filled completely if necessary. For this
purpose, Mercedes-Benz recommends a
qualified specialist workshop.
Further information on DEF ( Y page 387).
The DEF filler neck is under the trunk floor.XSwitch off the ignition.XOpen the trunk.XLift up the trunk floor ( Y page 286).XTurn DEF cap : counter-clockwise and
remove it.166RefuelingDriving and parking
XTurn DEF filler cap ; counter-clockwise
and open it.
Filler cap ; is secured with a plastic strap.XUnscrew the covering cap from DEF refill
bottle =.XPlace DEF refill bottle = on the filler neck
as shown and screw on clockwise hand-
tight.
! Only screw on the DEF refill bottle hand-
tight. It could otherwise be damaged.
XPress DEF refill bottle = down.
The DEF tank is filled. This may take up to
one minute.
i If the DEF refill bottle is no longer pressed
down, the filling process stops and the
partially emptied bottle can be removed.
XRelease DEF refill bottle =.XTurn DEF refill bottle = counter-clockwise
and remove it.XPlace DEF filler cap ; on the filler neck and
turn it clockwise.XInsert DEF cap : as shown and turn it
clockwise as far as it will go.XFold the trunk floor down.XClose the trunk lid.XDrive at a speed above 10 mph (16 km/h).
The Check Additive See Operator's
Manual message goes out after
approximately one minute.
i If the Check Additive See
Operator's Manual message remains
shown in the multifunction display, add an
additional bottle of DEF.
i Then, have the DEF supply checked at a
qualified specialist workshop and
completely refilled if necessary.
Parking
Important safety notes
GWARNING
Do not park this vehicle in areas where
combustible materials can come into contact
with the hot exhaust system. Do not park the
vehicle on dry grassland or harvested grain
fields. Combustible materials, such as grass,
hay or leaves could be ignited by the hot
exhaust system and cause a vehicle fire.
Parking167Driving and parkingZ
Parcel netsGWARNING
Parcel nets are intended for storing light-
weight items only, such as road maps, mail,
etc.
Heavy objects, objects with sharp edges, or
fragile objects may not be transported in the
parcel nets. In an accident, during hard
braking, or sudden maneuvers, they could be
thrown around inside the vehicle and cause
injury to vehicle occupants.
Parcel nets cannot protect transported goods
in the event of an accident.
Parcel nets are located in the front-passenger
footwell and on the left and right-hand sides
of the trunk/cargo compartment.
Skibag
Unfolding the skibag and loading skis
GWARNING
The skibag is designed for up to four pairs of
skis. Do not load the skibag with any other
objects.
Always fasten the skibag securely. In an
accident, an unfastened ski bag can cause
injury to vehicle occupants.
XFold down the rear seat armrest.XPress release catches ; together and fold
down cover :.XPull skibag : into the vehicle interior and
unfold it.XOpen the trunk lid.XPress release button :.
The flap opens downwards.XSlide the skis into the skibag from the
trunk.XPull strap : tight by the loose end until the
skis are held firmly inside the skibag.Stowage areas277Stowing and featuresZ
XEngage hook : in securing ring ;.XPull the strap tight by the loose end.
Removing the skis and folding up the
skibag
XLoosen the two straps.XRemove hook : from securing ring ;.XTake the skis out of the skibag.XClose the flap in the trunk.XSmooth out the skibag and fold it up.XPut the skibag into the backrest.XFold the cover back up.
i
You should always close the flap in the
trunk if you do not require the skibag. This
will prevent unauthorized access to the
trunk from the vehicle interior.
Removing the skibag
GWARNING
When the skibag has been removed, always
drive with the trunk lid closed. Exhaust fumes
could otherwise enter the vehicle interior.
The skibag can be removed for cleaning or
drying.
XOpen the trunk lid.XPress release catch :.
Flap ; folds down.XPress catch = in and pull out frame ?
containing the skibag.
Through-loading facility in the rear
compartment
GWARNING
Do not transport any unsecured items in the
through-loading area.
The through-loading facility is opened from
the trunk.
XFold down the rear seat armrest.XPress release button :.
The flap opens downwards.278Stowage areasStowing and features
Through-loading facility in the rear
bench seat (Sedan)
Important safety notesGWARNING
When expanding the cargo volume, always
fold the seat backrests fully forward.
Unless you are transporting cargo, the seat
backrests must remain properly locked in the
upright position.
In an accident, during hard braking or sudden
maneuvers, loose items will be thrown around
inside the vehicle. This can cause injury to
vehicle occupants unless the items are
securely fastened in the vehicle.
Always use the cargo tie-down rings.
The left-hand and right-hand rear seat
backrests can be folded down separately to
increase the trunk capacity.
Folding the seat backrest forward
i Vehicles with memory function: when you
fold one or both parts of the rear seat
backrest forwards, the respective front
seat moves forward slightly, when
necessary, in order to avoid contact.
XVehicles without memory function: if
necessary, move the driver's or front-
passenger seat forwards.XOpen the trunk.XPull right-hand or left-hand rear seat
backrest release handle :.
The corresponding rear seat backrest is
released and the rear seat head restraints
are lowered.XFold rear seat backrest ; forwards.XMove the driver's or front-passenger seat
back if necessary.
Folding the seat backrest back
XMove the driver's or front-passenger seat
forward if necessary.
! Make sure that the seat belt does not
become trapped when folding the rear seat
backrest back. Otherwise, it could be
damaged.
XFold rear seat backrest : back until it
engages.Stowage areas279Stowing and featuresZ
GWARNING
Always lock the seat backrest in its upright
position when the rear seat bench is
occupied, or the extended cargo volume is not
in use.
Check for secure locking by pushing and
pulling on the seat backrest.
In an accident, during hard braking or sudden
maneuvers, loose items will be thrown around
inside the vehicle. This can cause injury to
vehicle occupants unless the items are
securely fastened in the vehicle.
To help avoid personal injury during a collision
or sudden maneuver, exercise care when
transporting cargo.
i You should always engage the rear seat
backrests if you do not need the through-
loading feature. This will prevent
unauthorized access to the trunk from the
vehicle interior.
XAdjust the head restraints if necessary
( Y page 101).XMove the driver's or front-passenger seat
back if necessary.
EASY-PACK through-loading facility in
the rear bench seat (Wagon)
Important safety notes
GWARNING
Never drive a vehicle with the tailgate open.
Deadly carbon monoxide (CO) gases may
enter vehicle interior resulting in
unconsciousness and death.
Folding the rear seat backrest forward
The left-hand and right-hand rear seat
backrests can be folded forwards separately
to increase the cargo compartment capacity.
The combined cargo cover and net can
remain installed.
! When folding the rear seat backrest
forwards, ensure that there are no items
lying on the seat cushions. These items
could otherwise be damaged or could
themselves damage the rear seats.
i When you fold one or both parts of the
rear seat backrests forwards, the
headrests are also lowered if necessary. In
the case of vehicles with memory function,
the respective front seat is moved forwards
slightly to avoid contact with the seat
behind it.XVehicles without memory function: if
necessary, move the driver's or front-
passenger seat forwards.XPull the left-hand or right-hand release
handle at the rear in cargo
compartment : or at the side beside
backrests ;.
The corresponding backrest folds
forwards.XMove the driver's or front-passenger seat
back if necessary.280Stowage areasStowing and features
XWith your other hand, let the strap go slowly
until the load is secured.XMake sure that locking button ? on
brackets A is pressed.
This keeps brackets A in place on the
loading rail.XTo remove: press release button = on
respective bracket A and remove luggage
holder ; by pulling upwards and out.
Telescopic rod
The telescopic rod can be used to secure the
load against the rear seats to prevent it from
moving around.
XTo install: insert one bracket ; into both
the left and the right loading rails and slide
it to the desired position ( Y page 284).XInsert telescopic rod : into brackets ;
and, while doing so, press release
button ? and push the rod downwards
until it engages.XMake sure that locking button = on
brackets ; is pressed.
This keeps brackets ; in place on the
loading rail.XTo remove: press release button ? on
respective bracket ; and remove
telescopic rod : by pulling it upwards and
out.Stowage well under the trunk floor
(Sedan)
The TIREFIT kit, the vehicle tool kit, etc. are
located in the stowage compartment.XTo open: pull handle : upwards.XHook handle : into rain trough ;.
!
Unhook the handle before again before
closing the trunk lid and clip it in securely
to prevent the handle flap from protruding.
Otherwise, you could damage the handle.
EASY-PACK folding floor with stowage
compartment under the trunk floor
(Wagon)
Important safety notes
GWARNING
Do not carry unsecured objects under the
EASY-PACK folding luggage-compartment
floor if it is open.
Otherwise, you and other vehicle occupants
could be injured by objects being thrown
286Stowage areasStowing and features